MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 846d00828895f5f9d2089acfb7394c108c1dc538a0d738982e5636335745913f. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry

RemcosRAT

Vendor detections: 11

Intelligence 11 IOCs YARA 9 File information Comments

SHA256 hash:	846d00828895f5f9d2089acfb7394c108c1dc538a0d738982e5636335745913f
SHA3-384 hash:	5c215daa7b0dcfbdf096ffd5a68d4eb866f38a924c58352bc63d367617c5781f94d331e6c3a60d2a9c44764ad4dd0b0e
SHA1 hash:	3be4bdf1c8ea0b549e731aa358ed96e556fd5277
MD5 hash:	792aea96b39f22d5ed1579b4d5a89c23
humanhash:	lion-high-robin-september
File name:	MRC20201030XMY. pdf.scr
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	340'992 bytes
First seen:	2021-01-29 16:32:22 UTC
Last seen:	2021-01-29 19:20:41 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'452 x Formbook, 12'201 x SnakeKeylogger)
ssdeep	6144:9dYUVPb4EdMIlkngQDcnobi/6k+kLGOk2igx+fqeDzqXdQeNJSEBM:9v0qMIlkgQuxSvuGOk2Bx+Jz8QeNJR
Threatray	2 similar samples on MalwareBazaar
TLSH	7A740241B3E84B91E8FE57B54A3520201B35BC2EB973E71E9EDA70DA06337854631B1B
Reporter	abuse_ch
Tags:	RAT RemcosRAT scr

abuse_ch

Malspam distributing RemcosRAT:

HELO: beta.etsii.upm.es
Sending IP: 138.100.71.89
From: Valentina Zandoli <Admin-AR1@gratenau.com>
Subject: Re: Orden revisada MRC20201030XMY
Attachment: MRC20201030XMY. pdf.xz (contains "MRC20201030XMY. pdf.scr")

RemcosRAT C2:
graceland777.ddns.net

Intelligence

File Origin

# of uploads :

# of downloads :

199

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

MRC20201030XMY. pdf.scr

Verdict:

Malicious activity

Analysis date:

2021-01-29 16:51:41 UTC

Tags:

rat remcos

Link:

https://app.any.run/tasks/a5fcd810-5704-4d92-8bfb-65b52e7c16e3

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection:

Remcos

Link:

https://www.capesandbox.com/analysis/114769/

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Sending a UDP request

Sending a custom TCP request

Creating a file in the %AppData% directory

Creating a file in the %temp% directory

Launching a process

Creating a process with a hidden window

Deleting a recently created file

Unauthorized injection to a recently created process

Creating a file

DNS request

Sending a TCP request to an infection source

Enabling autorun by creating a file

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/594242

Signature

.NET source code contains potential unpacker

Contains functionality to capture and log keystrokes

Contains functionality to inject code into remote processes

Contains functionality to steal Chrome passwords or cookies

Contains functionality to steal Firefox passwords or cookies

Contains functionalty to change the wallpaper

Detected Remcos RAT

Injects a PE file into a foreign processes

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Sigma detected: Remcos

Sigma detected: Scheduled temp file as task from temp location

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Uses an obfuscated file name to hide its real file extension (double extension)

Uses dynamic DNS services

Uses schtasks.exe or at.exe to add and modify task schedules

Yara detected AntiVM_3

Yara detected Remcos RAT

Behaviour

Behavior Graph:

Download SVG

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/846d00828895f5f9d2089acfb7394c108c1dc538a0d738982e5636335745913f/

Threat name:

Win32.Trojan.Wacatac

Status:

Malicious

First seen:

2021-01-29 16:33:39 UTC

AV detection:

14 of 28 (50.00%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=qrwqbauisx27tuqitlh3ookmccgb3rjyudltrgboky3dgv2fse7q._file

Verdict:

unknown

RemcosRAT

eb805d5030c861fec54249670b911ad69bd6339de5e4deecbaf051633333ccb5

RemcosRAT

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos ransomware rat

Link:

https://tria.ge/reports/210129-kk8ykfmt6s/

Behaviour

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Suspicious use of SetThreadContext

Remcos

Malware Config

C2 Extraction:

graceland777.ddns.net:7773

Unpacked files

SH256 hash:

9f27ac79426a00906264371e92134f464cf84f0b43ed4a894a96b5fc0119056c

MD5 hash:

520ffdf455cf1d31769be34ab740fd4a

SHA1 hash:

9c1b871b3371205cae276ca0fbd6da673af8580d

Detections:

win_remcos_g0

win_remcos_auto

Link:

https://www.unpac.me/results/f8aeddbd-22a8-4008-9973-04bc146cdc64/

Parent samples :

846d00828895f5f9d2089acfb7394c108c1dc538a0d738982e5636335745913f
a289fb24de3542ae7f900243e70a57459631cf5d4fba19e7df4282f51b9f6434

SH256 hash:

a2a0bbbe8c9ee88441356010f63455c50dfcafe663db757bbc453c815c51d720

MD5 hash:

11e80c54bfeff7f0c120dae46df0a8be

SHA1 hash:

d597b9b0dcac06f0aa00a931bb90de8eba564651

Link:

https://www.unpac.me/results/f8aeddbd-22a8-4008-9973-04bc146cdc64/

SH256 hash:

a9d1946ab353f06890426dc517aa56095a77ff168cef59e8f503b36158622bef

MD5 hash:

6e167b66106b69cbedc2fae7ffa71020

SHA1 hash:

2500e9430baeeb368237889783c4c12fd2fdfa14

Link:

https://www.unpac.me/results/f8aeddbd-22a8-4008-9973-04bc146cdc64/

SH256 hash:

846d00828895f5f9d2089acfb7394c108c1dc538a0d738982e5636335745913f

MD5 hash:

792aea96b39f22d5ed1579b4d5a89c23

SHA1 hash:

3be4bdf1c8ea0b549e731aa358ed96e556fd5277

Link:

https://www.unpac.me/results/f8aeddbd-22a8-4008-9973-04bc146cdc64/

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Malicious File

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/846d00828895f5f9d2089acfb7394c108c1dc538a0d738982e5636335745913f

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:	ach_RemcosRAT Create hunting rule
Author:	abuse.ch

Rule name:	Chrome_stealer_bin_mem Create hunting rule
Author:	James_inthe_box
Description:	Chrome in files like avemaria

Rule name:	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer Create hunting rule
Author:	ditekSHen
Description:	detects Windows exceutables potentially bypassing UAC using eventvwr.exe

Rule name:	Keylog_bin_mem Create hunting rule
Author:	James_inthe_box
Description:	Contains Keylog

Rule name:	Parallax Create hunting rule
Author:	@bartblaze
Description:	Identifies Parallax RAT.

Rule name:	Remcos Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect Remcos in memory

Rule name:	remcos_rat Create hunting rule
Author:	jeFF0Falltrades

Rule name:	REMCOS_RAT_variants Create hunting rule

Rule name:	win_remcos_auto Create hunting rule
Author:	Felix Bilstein - yara-signator at cocacoding dot com
Description:	autogenerated rule brought to you by yara-signator